Furnace door frame



Feb. 3, 1959 L. H. HUTTON FURNACE DOOR FRAME 2 Sheets$het 1 Filed 001;.21, 1955 INVENTOR. LELAND H. HUTTON ATTORNEYS Feb. 3, 1959 H. HUTTON2,871,834

7 FURNACE DOOR FRAME Filed Oct. 21, 1955 2 Sheets-Sheet 2 l6- i g |8 AII '9 2 4 Z7 Z5 A4 28 Fig. 4

Fig. 6

INVENTOR. LELAND H. HUTTON ATTORNEYS United States Patent FURNACE DOORFRAME Leland H. Hutton, University Heights, Ohio, assignor to HuttonFabricating and Manufacturing Corporation, Cleveland, Ohio, acorporation of Ohio This invention relates,as indicated, to furnace doorframes, but has reference more particularly to watercooled door framesof the type commonly used for the door openings of open-hearth furnaces.

A primary object of the invention is to provide a door frame of thecharacter described, which is so constructed as to effectively resistthe effects of the furnace heat, particularly in the area of the doorframe adjacent the corners of the arch.

Another object of the invention is to provide a door frame of thecharacter described which has incorporated therein a novel water coolingand water distributing system, which is effective to avoid turbulenceand prevent the formation of steam pockets.

\ A further object of the invention is to provide a door frame of thecharacter described, having a horizontal lintel of novel andadvantageous construction.

apparent during the course of the following description.

In the accompanying drawings forming a part of this specification and inwhich like numerals are employed to designate like parts throughout thesame,

Fig. 1 is a front elevational view of the furnace door frame;

Fig. 2 is a cross-sectional View, taken on the line 22 of Fig. 1;

Fig. 3 is a cross-sectional view, taken on the line 3-3 door frame is ofhollow construction, formed of sheet or plate steel, cut and shaped intopatterned sections and united in fluid-tight welded seams.

The door frame includes a vertical lintel portion 1, from the oppositeends of which jamb portions 2 and 3 extend. The lintel portion 1 andjamb portions 2 and 3 are formed of spaced front and back plates 4 and5, a

top plate 6, side plates 7 and 8, and arch plate 9, and

foot plates 10 and 11. These parts form a hollow structore, throughwhich water may be circulated for the purpose of protecting thestructure of the doorway of an open hearth furnace from the destructiveeffects of furnace heat.

The structure also includes a horizontal lintel, generally designated byreference numeral 12, which is adapted to underlie the skewback channelof the furnace roof. This horizontal lintel comprises a member havingfiat upper and lower Walls 13 and 14 respectively, which areinterconnected at their rear edges by an arcuate back wall 15. The endsof this member are closed by means of fiat plates 16 and 17, and thelintel is connected to the plate 5 by welding the front edges of theparts 13, 14, 16

and 17 to the plate 5 at a position just above the level of thehorizontal portion of the arch plate 9.

The structure further includes a second arch plate 18, which extendsgenerally parallel to the arch plate 9, in spaced relation to thelatter, and between the plates. 4 and 5, the legs of the plate 18terminating at points spaced from the foot plates 10 and 11.

Means have been provided for circulating water through the door frame ina novel and highly desirable manner. Such means includes a water inletpipe 19, which extends through the top plate 6 and is curved below theplate 6, in the manner shown in Fig. l, the pipe then extendinghorizontally to a point adjacent the longitudinal center of the lintel12. At this point, the pipe is bent to provide a rearwardly extendingportion 20, which passes through the back plate 5 and into the lintel12, as best shown in Fig. 3.

The water circulates through the lintel l2 and passes out of the latterat the upper end corners thereof, as best ,seen in Fig. 1, through pipes21 and 22, which extend member diverts the flow of water from the pipe26, so

that the water passes in both directions through the space Other objectsand advantages of my invention will be between the plates 9 and 18,thence upwardly through the space between the plate 18 and plates 7 and8, thence out of the frame through outlet pipe 28.

The flow of water is diagrammatically illustrated by the arrows inFig. 1. The transverse cross-section of the lintel 12, combined with thefact that the water enters the lintel adjacent its longitudinal centerand passes out of the lintel at the upper end corners thereof, is highlyeffective to avoid turbulence and prevent the formation of steampockets.

The location of the pipes 23-24-25 within the lintel portion 1 of thedoor frame not only protects these pipes from the effects of the furnaceheat, but provides a natural gravity flow and uniform distribution ofthe cooling water over the arch plate 9, so as to provide maximumcooling for this plate and adjacent parts of the door frame.

It may be noted at this point that only a single set (19 and 28) ofinlet and outlet pipes is provided for the entire cooling arrangement,comprising the lintel 12 and pipes 24. This is in contradistinction tothe ar rangement shown in McDonnell Patent No. 2,246,403, in which twosets of inlet and outlet pipes are required.

A highly important feature of the invention resides in the use of thesecond arch plate 18. This plate serves a number of purposes. It notonly greatly strengthens the door frame in an area where maximumstrength is required, namely at the corners of the arch, but maintainsthe radii of these corners, preventing the jamb portions 2 and 3 of thedoor frame from spreading outwardly. It also serves to force achannelled flow of water against the plate 9, providing positive coolingalong the entire length of this plate, and preventing burn-out of theframe at the corners of the arch. All of this results in a greatlyprolonged life for the door frame.

In practice, the legs of the plate 18 terminate at points about 16inches from the plates 10 and 11. This enables circulation of the waterto continue, even should a large amount of sediment or residue of solidsfrom the circulating water collect in the bottom of the jamb portions 2and 3 of the frame.

In order to permit periodic cleanout or washout of the frame, drainageopenings 28 are provided adjacent the lower ends of the jamb portions 2and 3. These openings are maintained closed during normal use of thedoor frame.

It is thus seen that I have provided a door frame of the characterdescribed, which admirably fulfills all of the stated objects of theinvention.

It is to be understood that the form of my invention, herewith shown anddescribed, is to be taken as a preferred example of the same, and thatvarious changes in the shape, size and arrangement of parts may beresorted to, without departing from the spirit of my invention, or thescope of the subjoined claims.

Having thus described my invention, I claim:

1. In a furnace door frame of the character described, front and rearplates defining, in part, a hollow structure consisting of a verticallintel and spaced jamb portions extending from said lintel, an archplate for closing the bottom of said frame, and a second arch platewithin the hollow structure in parallel spaced relation to said firstarch plate, a hollow member extending rearwardly from said rear plateand defining a horizontal lintel, means for circulating a fluid throughsaid hollow structure and horizontal lintel, said means comprising aninlet pipe extending from one of the upper corners of said structure toa point adjacent the center of the horizontal lintel, conduits forconducting said fluid from the ends of said horizontal lintel to acommon point within said vertical lintel at substantially the horizontalcenter thereof, said conduits extending in a forward direction andthence upwardly into the vertical lintel and thence horizontally to saidcommon point, a conduit for conducting said fluid from said common pointto said jamb portions, said last-named conduit extending through 4, thecenter of said second arch plate, whereby to divert said fiuid into thespace between the arch plates, and a fluid outlet pipe adjacent theother upper corner of said structure for conducting the fluid from saidjamb portions to a point exteriorly of the door frame.

2. In a furnace door frame of the character described, front and rearplates defining, in part, a hollow structure consisting of a verticallintel and spaced jamb portions extending from said lintel, an archplate for closing the bottom of said frame, and a second arch platewithin the hollow structure in parallel spaced relation to said firstarch plate, a hollow member extending rearwardly from said rear plateand defining a horizontal lintel, means for circulating a fluid throughsaid hollow structure and horizontal lintel, said means comprising aninlet pipe extending from one of the upper corners of said structure toa point adjacent the center of the horizontal lintel, conduits forconducting said fluid from the ends of said horizontal lintel to acommon point within said vertical lintel at substantially the horizontalcenter thereof, a conduit for conducting said fluid from said commonpoint vertically downward through the center of said second arch plateand into the space between said arch plates, means for diverting thefluid as it enters said space whereby to cause the fluid to flow in bothdirections through the space between the arch plates, and a fluid outletpipe adjacent the other upper corner of said structure for conductingthe fluid from said jamb portions to a point exteriorly of the doorframe.

References Cited in the file of this patent UNITED STATES PATENTS1,836,784 Williams Dec. 15, 1931 2,135,828 McAfoos Nov. 8, 19382,211,544 McDonnell Aug. 13, 1940 2,246,403 McDonnell June 17, 19412,552,142 Braun May 8, 1951 the; a.

